[英]Apache POI NoClassDefFoundError while reading excel files
I am attempting to run this code: 我正在尝试运行以下代码:
public class ExcelSimpleTest {
public static void main(String[] args) throws Exception {
File f = new File("C:\\Users\\yaron\\Desktop\\Test.xlsx");
FileInputStream fis = new FileInputStream(f);
XSSFWorkbook wb=new XSSFWorkbook(fis);
Sheet sheet=wb.getSheetAt(0);
System.out.println(sheet.getRow(0).getCell(0).getStringCellValue());
}
}
And am getting this error: 并收到此错误:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections4/ListValuedMap
at src.ExcelSimpleTest.main(ExcelSimpleTest.java:22)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections4.ListValuedMap
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
I checked on the internet and copied over the Apache POI files and don't understand what my problem is. 我在互联网上检查并复制了Apache POI文件,但不明白我的问题是什么。
It Looks like you miss the commons-collection4.jar in your classpath. 好像您在类路径中错过了commons-collection4.jar。 Download it and add it to your classpath.
下载它并将其添加到您的类路径中。 If you use maven you can add
如果您使用Maven,则可以添加
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-collections4 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.1</version>
</dependency>
to your pom. 到您的pom。
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